this is a storm that slammed the west coast from washington down to the san francisco bay. just take a look at this. the beautiful napa valley tonight has vineyards under water. it was a one, two, three punch. three storms in less than one week plowing down on the west coast, the latest today dropping up to an inch of rain an hour in some spots. in reno, nevada, wind gusts reported to hit 95 miles an hour. nearly 100,000 people without power. homes flooded, roofs smashed and cars under water. rig toppled over. and temporarily closing this bridge, a crucial artery across the san francisco bay. >> be prepared. >> reporter: across northern california, swollen rivers threaten to flood cities like napa where sandbags are passed out and countless trees came crashing down. we saw this one fall before our eyes. how close did it come to you? >> within feet of my truck. >> reporter: we were driving down this highway in napa and this tree came crashing down in front of us. i want to show you how huge this tree is. take a look. a giant tree. i mean, the roots of this thing are four fee